/*
 * Copyright 2009 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.codename1.impl.android;

import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.app.Activity;
import android.content.ActivityNotFoundException;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;

import com.codename1.components.SpanLabel;
import com.codename1.ui.Button;
import com.codename1.ui.Container;
import com.codename1.ui.Dialog;
import com.codename1.ui.events.ActionEvent;
import com.codename1.ui.events.ActionListener;
import com.codename1.ui.layouts.BorderLayout;
import com.codename1.ui.layouts.BoxLayout;

/**
 * <p>A utility class which helps ease integration with Barcode Scanner via {@link Intent}s.
 * This is a simple way to invoke barcode scanning and receive the result,
 * without any need to integrate, modify, or learn the project's source
 * code.</p>
 *
 * <h2>Initiating a barcode scan</h2>
 *
 * <p>To integrate, create an instance of {@code IntentIntegrator} and call {@link #initiateScan()}
 * and wait for the result in your app.</p>
 *
 * <p>It does require that the Barcode Scanner (or work-alike) application is
 * installed. The
 * {@link #initiateScan()} method will prompt the user to download the
 * application, if needed.</p>
 *
 * <p>There are a few steps to using this integration. First, your {@link Activity}
 * must implement the method {@link Activity#onActivityResult(int, int, Intent)}
 * and include a line of code like this:</p>
 *
 * <pre>{@code
 * public void onActivityResult(int requestCode, int resultCode, Intent intent) {
 *   IntentResult scanResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, intent);
 *   if (scanResult != null) {
 *     // handle scan result
 *   }
 *   // else continue with any other code you need in the method ... } }</pre>
 *
 * <p>This is where you will handle a scan result.</p>
 *
 * <p>Second, just call this in response to a user action somewhere to begin the
 * scan process:</p>
 *
 * <pre>{@code
 * IntentIntegrator integrator = new IntentIntegrator(yourActivity);
 * integrator.initiateScan();
 * }</pre>
 *
 * <p>Note that {@link #initiateScan()} returns an {@link AlertDialog} which is
 * non-null if the user was prompted to download the application. This lets the
 * calling app potentially manage the dialog. In particular, ideally, the app
 * dismisses the dialog if it's still active in its {@link Activity#onPause()}
 * method.</p>
 *
 * <p>You can use {@link #setTitle(String)} to customize the title of this
 * download prompt dialog (or, use
 * {@link #setTitleByID(int)} to set the title by string resource ID.) Likewise,
 * the prompt message, and yes/no button labels can be changed.</p>
 *
 * <p>Finally, you can use {@link #addExtra(String, Object)} to add more
 * parameters to the Intent used to invoke the scanner. This can be used to set
 * additional options not directly exposed by this simplified API.</p>
 *
 * <p>By default, this will only allow applications that are known to respond to
 * this intent correctly do so. The apps that are allowed to response can be set
 * with {@link #setTargetApplications(Collection)}. For example, set to {@link #TARGET_BARCODE_SCANNER_ONLY}
 * to only target the Barcode Scanner app itself.</p>
 *
 * <h2>Sharing text via barcode</h2>
 *
 * <p>To share text, encoded as a QR Code on-screen, similarly, see {@link #shareText(CharSequence)}.</p>
 *
 * <p>Some code, particularly download integration, was contributed from the
 * Anobiit application.</p>
 *
 * <h2>Enabling experimental barcode formats</h2>
 *
 * <p>Some formats are not enabled by default even when scanning with {@link #ALL_CODE_TYPES},
 * such as
 * {@link com.google.zxing.BarcodeFormat#PDF_417}. Use {@link #initiateScan(java.util.Collection)}
 * with a collection containing the names of formats to scan for explicitly,
 * like "PDF_417", to use such formats.</p>
 *
 * @author Sean Owen
 * @author Fred Lin
 * @author Isaac Potoczny-Jones
 * @author Brad Drehmer
 * @author gcstang
 */
public class IntentIntegrator {

    public static final int REQUEST_CODE = 0x0000c0de; // Only use bottom 16 bits
    private static final String TAG = IntentIntegrator.class.getSimpleName();
    public static final String DEFAULT_TITLE = "Install Barcode Scanner?";
    public static final String DEFAULT_MESSAGE =
            "This application requires Barcode Scanner. Would you like to install it?";
    public static final String DEFAULT_YES = "Yes";
    public static final String DEFAULT_NO = "No";
    private static final String BS_PACKAGE = "com.google.zxing.client.android";
    private static final String BSPLUS_PACKAGE = "com.srowen.bs.android";
    private static final String BSSIMPLE_PACKAGE = BSPLUS_PACKAGE+".simple";

    // supported barcode formats
    public static final Collection<String> PRODUCT_CODE_TYPES = list("UPC_A", "UPC_E", "EAN_8", "EAN_13", "RSS_14");
    public static final Collection<String> ONE_D_CODE_TYPES =
            list("UPC_A", "UPC_E", "EAN_8", "EAN_13", "CODE_39", "CODE_93", "CODE_128",
                    "ITF", "RSS_14", "RSS_EXPANDED");
    public static final Collection<String> QR_CODE_TYPES = Collections.singleton("QR_CODE");
    public static final Collection<String> DATA_MATRIX_TYPES = Collections.singleton("DATA_MATRIX");
    public static final Collection<String> ALL_CODE_TYPES = null;
    public static final Collection<String> TARGET_BARCODE_SCANNER_ONLY = Collections.singleton(BS_PACKAGE);
    public static final Collection<String> TARGET_ALL_KNOWN = list(
            BS_PACKAGE,
            BSSIMPLE_PACKAGE, // Barcode Scanner+ Simple
            BSPLUS_PACKAGE, // Barcode Scanner+
            "la.droid.qr",
            "la.droid.qr.priva"
    );
    private final Activity activity;
    private String title;
    private String message;
    private String buttonYes;
    private String buttonNo;
    private Collection<String> targetApplications;
    private final Map<String, Object> moreExtras;

    public IntentIntegrator(Activity activity) {
        this.activity = activity;
        title = DEFAULT_TITLE;
        message = DEFAULT_MESSAGE;
        buttonYes = DEFAULT_YES;
        buttonNo = DEFAULT_NO;
        targetApplications = TARGET_ALL_KNOWN;
        moreExtras = new HashMap<String, Object>(3);
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public void setTitleByID(int titleID) {
        title = activity.getString(titleID);
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }

    public void setMessageByID(int messageID) {
        message = activity.getString(messageID);
    }

    public String getButtonYes() {
        return buttonYes;
    }

    public void setButtonYes(String buttonYes) {
        this.buttonYes = buttonYes;
    }

    public void setButtonYesByID(int buttonYesID) {
        buttonYes = activity.getString(buttonYesID);
    }

    public String getButtonNo() {
        return buttonNo;
    }

    public void setButtonNo(String buttonNo) {
        this.buttonNo = buttonNo;
    }

    public void setButtonNoByID(int buttonNoID) {
        buttonNo = activity.getString(buttonNoID);
    }

    public Collection<String> getTargetApplications() {
        return targetApplications;
    }

    public void setTargetApplications(Collection<String> targetApplications) {
        this.targetApplications = targetApplications;
    }

    public void setSingleTargetApplication(String targetApplication) {
        this.targetApplications = Collections.singleton(targetApplication);
    }

    public Map<String, ?> getMoreExtras() {
        return moreExtras;
    }

    public void addExtra(String key, Object value) {
        moreExtras.put(key, value);
    }

    /**
     * Initiates a scan for all known barcode types.
     */
    //public boolean initiateScan() {
    //    return initiateScan(ALL_CODE_TYPES);
    //}

    /**
     * Initiates a scan only for a certain set of barcode types, given as
     * strings corresponding to their names in ZXing's {@code BarcodeFormat}
     * class like "UPC_A". You can supply constants like {@link #PRODUCT_CODE_TYPES}
     * for example.
     *
     * to download the app if a prompt was needed, or null otherwise
     */
    public boolean initiateScan(Collection<String> desiredBarcodeFormats, String mode) {
        Intent intentScan = new Intent(BS_PACKAGE + ".SCAN");
        intentScan.addCategory(Intent.CATEGORY_DEFAULT);

        intentScan.putExtra("SCAN_MODE", mode);
        // check which types of codes to scan for
        if (desiredBarcodeFormats != null) {
            // set the desired barcode types
            StringBuilder joinedByComma = new StringBuilder();
            for (String format : desiredBarcodeFormats) {
                if (joinedByComma.length() > 0) {
                    joinedByComma.append(',');
                }
                joinedByComma.append(format);
            }
            intentScan.putExtra("SCAN_FORMATS", joinedByComma.toString());
        }

        String targetAppPackage = findTargetAppPackage(intentScan);
        if (targetAppPackage == null) {
            showDownloadDialog();
            return false;
        }
        intentScan.setPackage(targetAppPackage);
        intentScan.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        intentScan.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
        attachMoreExtras(intentScan);
        startActivityForResult(intentScan, REQUEST_CODE);
        return true;
    }

    /**
     * Start an activity.<br> This method is defined to allow different methods
     * of activity starting for newer versions of Android and for compatibility
     * library.
     *
     * @param intent Intent to start.
     * @param code Request code for the activity
     * @see android.app.Activity#startActivityForResult(Intent, int)
     * @see android.app.Fragment#startActivityForResult(Intent, int)
     */
    protected void startActivityForResult(Intent intent, int code) {
        activity.startActivityForResult(intent, code);
    }

    private String findTargetAppPackage(Intent intent) {
        PackageManager pm = activity.getPackageManager();
        List<ResolveInfo> availableApps = pm.queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
        if (availableApps != null) {
            for (ResolveInfo availableApp : availableApps) {
                String packageName = availableApp.activityInfo.packageName;
                if (targetApplications.contains(packageName)) {
                    return packageName;
                }
            }
        }
        return null;
    }

    private void showDownloadDialog() {
        final Dialog d = new Dialog();
        d.setTitle(title);


        final String[] chosenPackage = new String[1];
        if (android.os.Build.VERSION.SDK_INT >= 33) {

            Button bs = new Button("Barcode Scanner");
            Button bsSimple = new Button("Barcode Scanner + Simple");
            Button cancel = new Button("Cancel");
            bsSimple.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent evt) {
                    chosenPackage[0] = BSSIMPLE_PACKAGE;
                    d.dispose();
                }
            });

            bs.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent evt) {
                    chosenPackage[0] = BS_PACKAGE;
                    d.dispose();
                }
            });
            cancel.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent evt) {
                    d.dispose();
                }
            });

            Container dialogBody = BoxLayout.encloseY(
                    new SpanLabel("Please select a barcode scanner app to install:"),
                    bs,
                    bsSimple,
                    cancel
            );
            d.getContentPane().removeAll();
            d.getContentPane().setLayout(new BorderLayout());
            d.getContentPane().add(BorderLayout.CENTER, dialogBody);
            d.show();
        } else {
            if (Dialog.show(title, message, "Yes", "No")) {
                chosenPackage[0] = BSSIMPLE_PACKAGE;
            }
        }

        if (chosenPackage[0] != null) {
            Uri uri = Uri.parse("market://details?id=" + chosenPackage[0]);
            Intent intent = new Intent(Intent.ACTION_VIEW, uri);
            try {
                activity.startActivity(intent);
            } catch (ActivityNotFoundException anfe) {
                // Hmm, market is not installed
                Log.w(TAG, "Android Market is not installed; cannot install Barcode Scanner");
            }
        }

    }

    /**
     * Defaults to type "TEXT_TYPE".
     *
     * @see #shareText(CharSequence, CharSequence)
     */
    public boolean shareText(CharSequence text) {
        return shareText(text, "TEXT_TYPE");
    }

    /**
     * Shares the given text by encoding it as a barcode, such that another user
     * can scan the text off the screen of the device.
     *
     * @param text the text string to encode as a barcode
     * @param type type of data to encode. See {@code com.google.zxing.client.android.Contents.Type}
     * constants.
     * to download the app if a prompt was needed, or null otherwise
     */
    public boolean shareText(CharSequence text, CharSequence type) {
        Intent intent = new Intent();
        intent.addCategory(Intent.CATEGORY_DEFAULT);
        intent.setAction(BS_PACKAGE + ".ENCODE");
        intent.putExtra("ENCODE_TYPE", type);
        intent.putExtra("ENCODE_DATA", text);
        String targetAppPackage = findTargetAppPackage(intent);
        if (targetAppPackage == null) {
            showDownloadDialog();
            return false;
        }
        intent.setPackage(targetAppPackage);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
        attachMoreExtras(intent);
        activity.startActivity(intent);
        return true;
    }

    private static Collection<String> list(String... values) {
        return Collections.unmodifiableCollection(Arrays.asList(values));
    }

    private void attachMoreExtras(Intent intent) {
        for (Map.Entry<String, Object> entry : moreExtras.entrySet()) {
            String key = entry.getKey();
            Object value = entry.getValue();
            // Kind of hacky
            if (value instanceof Integer) {
                intent.putExtra(key, (Integer) value);
            } else if (value instanceof Long) {
                intent.putExtra(key, (Long) value);
            } else if (value instanceof Boolean) {
                intent.putExtra(key, (Boolean) value);
            } else if (value instanceof Double) {
                intent.putExtra(key, (Double) value);
            } else if (value instanceof Float) {
                intent.putExtra(key, (Float) value);
            } else if (value instanceof Bundle) {
                intent.putExtra(key, (Bundle) value);
            } else {
                intent.putExtra(key, value.toString());
            }
        }
    }
}
